new dihydrokloridhydrat of 7 - ( 0a - (2aminotiazol - 4 - yl) - 0a - (z) - metoxiiminoacetamido) - 3 - ((1 - metylpyrrolidino) - methyl) - 3-cephem-4-carboxylic acid in crystalline form

摘要

Temp. stable crystalline salts of alpha-(2-aminothiazol-4-yl) alpha-(Z)-methoxyiminoacetamido) -3 -(1-methyl-1-pyrrolidinio) methyl)-3-cephem-4-carboxylate (I) are claimed, selected from sulphuric, di-nitric, monohydrochloric and di-hydrochloric acid addn. salts and orthophosphoric acid addn. salts contg. 1.5-2 molar equivalents of H3PO4, or solvates of tehse. The salt may be mixed with a base e.g. L(+) lysine or L(+) arginine.